EDITOR EXPERIENCE

          |       DESIGNER    |    PLAYER          |      notes
----------+-------------------+--------------------+-------------------
EDIT MODE | can lock/unlock   | all items unlocked |  inventory visible
MOVE MODE |        *          | ONLY ON PC VERSION |  same logic as campaign levels: unlocked items can be moved.
PLAY MODE |        *          |          *         |  simulation running; interface noninteractive

CAMPAIGN EXPERIENCE

          |       DESIGNER    |    PLAYER          |      notes
----------+-------------------+--------------------+-------------------
EDIT MODE |       N/A         | XXXXXXXXXXXXXXXXXX |  inventory visible
MOVE MODE |       N/A         |        *           |  same logic as campaign levels: unlocked items can be moved.
PLAY MODE |       N/A         |        *           |  simulation running; interface noninteractive

Pressing play always enters PLAY MODE
Pressing stop returns to previous mode
Pressing flag goes EDIT MODE <-> PLAY MODE. Flag only appears on PC builds.
Pressing [enter] is a shortcut for Pressing FLAG (only on developer build)